Created
February 25, 2019 00:57
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Nested Data Structures Shallow Copy Question
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| arr1 = ["a", "b", "c"] | |
| arr2 = arr1.dup | |
| p arr1.object_id | |
| p arr2.object_id | |
| p arr1.object_id == arr2.object_id # false | |
| p arr1[0].object_id | |
| p arr2[0].object_id | |
| p arr1[0].object_id == arr2[0].object_id # true | |
| arr2.map! do |char| | |
| char.upcase | |
| end | |
| p arr1 # => ["a", "b", "c"] | |
| p arr2 # => ["A", "B", "C"] | |
| p arr1.object_id | |
| p arr2.object_id | |
| p arr1.object_id == arr2.object_id # false | |
| p arr1[0].object_id | |
| p arr2[0].object_id | |
| p arr1[0].object_id == arr2[0].object_id # false |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| arr1 = ["a", "b", "c"] | |
| arr2 = arr1.dup | |
| p arr1.object_id | |
| p arr2.object_id | |
| p arr1.object_id == arr2.object_id # false | |
| p arr1[0].object_id | |
| p arr2[0].object_id | |
| p arr1[0].object_id == arr2[0].object_id # true | |
| arr2.map do |char| | |
| char.upcase! | |
| end | |
| p arr1 # => ["A", "B", "C"] | |
| p arr2 # => ["A", "B", "C"] | |
| p arr1.object_id | |
| p arr2.object_id | |
| p arr1.object_id == arr2.object_id # false | |
| p arr1[0].object_id | |
| p arr2[0].object_id | |
| p arr1[0].object_id == arr2[0].object_id # true |
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